Tycho's supernova and the Hubble constant

Details Tycho's supernova and the Hubble constant Tycho's supernova and the Hubble constant

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...289....5d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 289, Feb. 1, 1985, p. 5-9.

Astronomy and Astrophysics

Astronomy

22

Cosmology, Hubble Constant, Supernova Remnants, Distance, Local Group (Astronomy), Red Shift, Virgo Galactic Cluster

Scientific paper

Recent determinations of the distance of 3C 10, the remnant of SN 1572, are reviewed. All the results indicate distances smaller than earlier estimates suggested. The absolute magnitude of SN 1572 is found to be M(v) = -18.55 + or - 0.3 M(pg) = -18.85 + or - 0.3. Mean corrected magnitudes of four well-observed Type I supernova in the Virgo Cluster and five in the Coma Cluster lead to distances of 12.2-13.7 and 68-80 Mpc, respectively, according to whether or not M(pg) depends on the rate of decay. With these distances and the mean radial velocities corrected for the peculiar motion of the Local Group, the corresponding values for the Hubble ratio are in the range 89-100 and 92-108 km/s/Mpc, or 97 + or - 20 on the average. This result confirms the validity of Type I supernovae as distance indicators and the importance of further studies of the remnant of Tycho's supernova.

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